... The construction is
perfectly successful; the chronometer remains in coincidence with the
Transit Clock through any length of time, with a small constant error
as is required by mechanical theory."--"The printed volume of
Observations for 1864 has two Appendixes; one containing the
calculations of the value of the Moon's Semi-diameter deduced from 295
Occultations observed at Cambridge and Greenwich from 1832 to 1860,
and shewing that the Occultation Semi-diameter is less than the
Telescopic Semi-diameter by 2"; the other containing the reduction of
the Planetary Observations made at the Royal Observatory in the years
1831-1835; filling up the gap, between the Planetary Reductions
1750-1830 made several years ago under my superintendence, and the
Reductions contained in the Greenwich Volumes 1836 to the present
time: and conducted on the same general principles."--"Some trouble
had been found in regulating the temperature of the Magnetic Basement,
but it was anticipated that in future there would be no difficulty in
keeping down the annual variation within about 5 deg. and the diurnal
variation within 3 deg..--Longitudes in America were determined in this
year by way of Valencia and Newfoundland: finished by Nov.
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